Here's a shocking truth I learned today, though: a hardcover collected edition featuring about 5 issues per cover is sold here in Brazil for roughly 8 dollars. This is a first to me: the day a translated, hardcover, printed book would sell for far less than the imported virtual ebook. If I were to download 5 issues from ComiXology I'd spend 5*2 = 10 dollars.

Not sure if it is the case with Y. But for many comics at comixology you can buy volumes - these are usually discounted by the price of one comic.